Note: Malabrigo lists this as sport but yarn is DK by Ravelry standards.

Very soft, plied superwash 100% merino yarn.

From malabrigo.com:

A soft and sturdy plied sport-weight, Arroyo has quickly become a favorite among knitters! It’s perfect for those everyday lightweight (but warm) garments, and the superwash wool means it’s easy to take care of. Think of it as a Rios’s baby brother! (And speaking of babies, it’s perfect for them too.)